# SDR CA110128007

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 26, 2011
- Submitted: September 14, 2015
- Operation: General aviation
- Make and model: Bell 407
- Registry model: [Bell 407](https://openairdocs.org/model/bell-helicopter-textron-canada-407) (OpenAirDocs)
- Aircraft time: 1,604 hours
- Engine: Allsn 250C47B
- System (JASC): [6220 · Main Rotor Head](https://openairdocs.org/jasc/6220)
- Part: Bearing
- Part number: 407310101105
- Condition: Delaminated
- Location: M/R Hub
- Part time: 1,554 hours
- Component: Hub, Bell
- Component part number: 407010100123
- Stage of operation: IN
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CA110128007

## Discrepancy

(CAN) THE ENGINEER WAS TROUBLESHOOTING A VIBRATION WHEN IT WAS DISCOVERED, VISUALLY A DELAMINATION OF THE RUBBER COMPOUND OF THE SHEAR BEARING.

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